Re: NULLS vs Empty result in PHP

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Dan Shirah wrote:
> Morning!
> 
> Just a quick question.
> 
> Say I have a column in my database that could contain NULLS, empty spaces,
> or an actual value.
> 
> If I do:
> 
> $my_query = "SELECT my_column FROM my_database WHERE 1 = 1";
> $my_result = ifx_query($my_query, $connect_id);
> 
> while($row = ifx_fetch_row($my_result)) {
>   $my_column = trim($row['my_column']);
> 
>   if ($my_column != "") {
>    echo "Test";
>   }
> }
> 
> The way PHP assigns the query results to the $my_column variable, wouldn't;
> if ($my_column != "")  not do anything for the rows that contained NULLS or
> empty spaces?
> 

>From reading the other responses to this thread, it seems that you want to
"skip" or "exclude" rows in the results where my_column === null.

If this is correct, why not do it in the SELECT statement to begin with?

$my_query = "SELECT my_column FROM my_database WHERE my_column IS NOT NULL";

That should do it.


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